... ISO9001, Solar Keymark, SRCC, EMC, LVD, Certificates. Heat pipe solar collector, solar vacuum tube collector, with CE, ISO9001, ... The water is heated by the heat pipe rapidly.2) Heat pipe has its special principle and function,3 ... thickness / AluminiumFrame Material1.5mm thickness /Galvanized or AluminiumHeader Pipe Material1.2mm thickness /CopperInsulationPolyurethane /RockwoolRubber Seals and RingsUV ...